One of Hawaii’s most photographed natural wonders is gone. The Holei Sea Arch collapsed into the Pacific Ocean during a powerful storm in late September.

Officials at Hawaii Volcanoes National Park found the 90-foot arch missing when the park reopened on September 28. It had been closed since September 23 because of Tropical Storm Nolo.

The arch formed about 550 years ago when a lava flow hit the sea and cooled into rock. Ocean waves then carved a hole through the lava over centuries, a process called differential erosion.

Park staff believe huge storm swells finished what the sea had started. The same storm cycle has battered the coast for years. In 2022, a massive swell broke a half-ton chunk off the arch.

“We are saddened to report that our cherished 90-foot Holei Sea Arch collapsed,” the park wrote online, adding “RIP Holei Sea Arch.”

The area is now closed to visitors. Officials warn the cliff edge is unstable and dangerous. Parts of the arch had already fallen in 2018 earthquakes and a 2022 swell.